A man in his early 20s died after two motorbikes crashed on Hartstown Road in Dublin at 6.50pm on Saturday evening.
The man was taken to Connolly Hospital where he died a short time later. The second motorcyclist, also a man in his early 20s, was uninjured.
The road was closed for a time for a technical examination.
Gardaí are appealing for witnesses and anyone with information is asked to contact them at Blanchardstown Garda Station on 01 - 6667000, The Garda Confidential Line 1800 666111 or any Garda Station.